Gererate tree from char sequence. The tree is building from char sequence and the tree stalk length is third of source char length. Tree row contains char count that equals to row number. Row numbering starts from 1. If row number is smaller then char sequence length other symbols will be spaces.
Example if sourse is 123456789 the generated tree will looks like:
1
23
345
4567
56789
678912
7891234
89123456
912345678
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